EXPLAIN
SELECT elt(2, 'abc', 'defg'),
       elt(3, 'aa', 'bb', 'cc', 'dd', 'ee', 'ff', 'gg'),
       elt('1', 'abc', 'defg'),
       elt(2, 'aa', CAST('2' AS TINYINT)),
       elt(2, 'aa', CAST('12345' AS SMALLINT)),
       elt(2, 'aa', CAST('123456789012' AS BIGINT)),
       elt(2, 'aa', CAST(1.25 AS FLOAT)),
       elt(2, 'aa', CAST(16.0 AS DOUBLE)),
       elt(null, 'abc', 'defg'),
       elt(0, 'abc', 'defg'),
       elt(3, 'abc', 'defg')
FROM src LIMIT 1;

SELECT elt(2, 'abc', 'defg'),
       elt(3, 'aa', 'bb', 'cc', 'dd', 'ee', 'ff', 'gg'),
       elt('1', 'abc', 'defg'),
       elt(2, 'aa', CAST('2' AS TINYINT)),
       elt(2, 'aa', CAST('12345' AS SMALLINT)),
       elt(2, 'aa', CAST('123456789012' AS BIGINT)),
       elt(2, 'aa', CAST(1.25 AS FLOAT)),
       elt(2, 'aa', CAST(16.0 AS DOUBLE)),
       elt(null, 'abc', 'defg'),
       elt(0, 'abc', 'defg'),
       elt(3, 'abc', 'defg')
FROM src LIMIT 1;